[automerger skipped] Merge "[RESTRICT AUTOMERGE] Add hide-non-system-overlay...

[automerger skipped] Merge "[RESTRICT AUTOMERGE] Add hide-non-system-overlay flag for HarmfulAppWarningActivity" into rvc-dev am: 0e5e1569 am: e7de5cde -s ours am: 28ba78de -s ours am: 688afae4 -s ours

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Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16743363

Change-Id: I2649014c5f423d8c7f8d712331a3170f40871da6